Open licensed and free use media
Search for media
Google Advanced Search lets you restrict search results to those with Creative Commons licenses or Public Domain.
The Creative Commons search page - you can use the tabs along the top of the Creative Commons search page to use a specific search engine such as Google, Yahoo!, Blip TV, etc.
Open and free use media sources
UnSplash. Freely usable images - see Unsplash license.
Flickr Advanced Search. Find Creative Commons licensed images on Flickr.
Public Domain Pictures. Public domain images (no copyright) - note possible non-commercial restrictions.
Morguefile.com. Free photos, some restrictions (see terms).
ImageAfter. Almost any use (see terms).
FreeImages. Most uses (see terms).
Open Clip Art Library. Public domain clip art.
PICOL PIctorial COmmuniation Language. Creative Commons (CC BY) licensed, open source icons.
WikiMedia Commons. Public domain and re-use licensed graphics, audio and video.
FreeSound. Creative Commons licensed sounds.
Jamendo. Royalty free music.
Free Music Archive. Creative Commons and other licenses.
Phlow Magazine. Creative Commons music.
CCmixter. Creative Commons and other licenses - check for restrictions.
Internet Archive. Free video, audio, graphic and text resources - check for restrictions.
OpenStreetMap. Open source, world-wide streetmaps (Creative Commons and Open Database licenses).
Attribute your open or free media
Open Washington - Open Attribution Builder. Use this online tool to generate accurate linked attributions for creative commons images you use on your website.